Zipperstop Wholesale YKK&reg; 23" Zipper - YKK #5 Nylon Coil Separating Zipper - Black (1 Zipper) Zipperstop Wholesale YKK 23" Zipper - YKK #5 Nylon Coil Separating Zipper - Black (1 Zipper) YKK's perfect zipper for light weight outerwear jackets. The slider runs on two coils on each side; the "teeth" are the coils. These zippers are thoroughly tested for strength and durability. COLOR MAY VARY ON YOUR MONITOR.